This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is SAIJ80X275-50 — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the SAIJ80X275-50 in place of this model. The SAI replacement keeps the same ISO 15552 mounting interface, bore, stroke, output force and accessories, so it drops straight into existing fixtures. It is the current-production version of this cylinder with an upgraded piston seal.
Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X275-50
The AirTAC Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X275-50 is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 275mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the drop-in replacement is the SAIJ80X275-50, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke275 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAIJ80X275-50
About the Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X275-50
The AirTAC SIJ80X275-50 is a double-acting single-rod ISO 15552 adjustable-stroke cylinder. An external stop screw lets you trim the extend stroke by up to 50 mm on-site, giving a usable 225-275 mm stroke window from the 275 mm nominal maximum. This 80 mm bore delivers 2513 N push and 2268 N pull at 0.5 MPa, features a 25 mm rod, M20x1.5 thread, and a G3/8 port.
This SIJ model is discontinued; the exact drop-in replacement is the SAIJ80X275-50, retaining the same ISO 15552 interface, force, and mounting. The SAIJ upgrade uses a two Y-shaped one-way piston seal for low start-up pressure and long life. Computed buyer insight: safe working load is roughly 1508 N (60% of the 0.5 MPa push), yielding a 128 kg vertical lift with a 2:1 margin. The stop sets end position only—it is not a load lock; use SAIL or BSAI for holding.
Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X275-50 Technical Specifications
| Model | Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X275-50 |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAIJ80X275-50 |
| Bore size | Ø80 mm |
| Stroke | 275 mm |
| Acting type | Double acting |
| Port size | G3/8 |
| Rod thread | M20×1.5 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Cushion | Adjustable, 36 mm |
| Max standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAIJ80X275-50 carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø80mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 2513 N | 2268 N |
| 0.7 MPa | 3519 N | — |
| Max (@1.0 MPa) | 513 kgf | |
The SAIJ80X275-50 produces the same force from the same bore — a true drop-in on output. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X275-50
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×275 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Legacy SI-family variants: SID (double rod), SIJ (adjustable stroke) — each maps to its SAI equivalent (SID→SAID, SIJ→SAIJ). Rod material: carbon steel (blank) / SUS420J2 (A) / SUS304 (B).
Where the Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X275-50 Is Used
Press Fit Tuning
Allows operators to dial in the exact 225-275 mm extend position on-site for pressing bearings without machining hard stops.
Variable Length Diverter
Adjusts the extend stroke by up to 50 mm to deflect varying package sizes on a conveyor line without swapping cylinders.
Carton Sealing Stroke
Trims the extend stroke on-site to accommodate different carton depths, ensuring precise flap folding and sealing pressure.
Replacing the Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X275-50 with the SAIJ80X275-50
To replace the discontinued SIJ80X275-50, order the drop-in SAIJ80X275-50, keeping the same 50 mm adjust window for a 225-275 mm extend stroke. When sizing both ways, the neighboring 63 mm bore yields 1559 N push at 0.5 MPa, while the 100 mm bore yields 3927 N; this 80 mm bore provides 2513 N. Mounting options include FA, LB, and TC brackets. Because this SKU lacks the -S suffix, it cannot take a magnetic switch. For strokes over 300 mm, carefully manage side-load to prevent rod binding. The stop screw sets end position but does not lock; for held loads use an external rod lock.
Replacement checklist
- ✓ Same ISO 15552 interface → SAIJ80X275-50
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SIJ80 Dual Axis Adjustable Cylinder SIJ80X275-50 FAQ
Yes, the SIJ80X275-50 is discontinued. The exact drop-in replacement is the SAIJ80X275-50, which shares the same ISO 15552 interface, 80 mm bore, 275 mm stroke, 50 mm adjust window, G3/8 port, and mounting options. The SAIJ features an upgraded two Y-shaped one-way piston seal for longer life.
The 80 mm bore provides 2513 N push and 2268 N pull at 0.5 MPa, 3518 N push at 0.7 MPa, and 4523 N push at 0.9 MPa, with a theoretical max of 513 kgf at 1.0 MPa. The external stop screw provides a 50 mm adjust window, allowing you to trim the extend stroke from the 275 mm maximum down to 225 mm. The stop sets end position and is not a load lock.
Related AirTAC SAI Cylinders
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